restore large files from tape

Everything about backing up to tape

Re: restore large files from tape

Veeam Logoby Gostev » Wed Mar 12, 2014 11:32 pm

d.popov wrote:Enabling/disabling hardware encryption could dramatically impact performance on backup/restore operations from tape libraries. (as well as hardware compression).

I don't think you are right with this statement, Dmitry. From what I know, those are designed to be performed at the data stream speed. Anyway, I am not sure how potential performance implications are relevant to what is being discussed in this topic (file corruption).
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Re: restore large files from tape

Veeam Logoby mazur1000 » Thu Mar 13, 2014 9:07 am

I still checked restored from tape backup (3 tapes). In one VM has a bug. I think all the backups to tape, occupying more than one tape is inconsistency (backup files and backup VM)

Statistic:
VM count: xxxx
Incomplete VM count: 0
Failed VM count: 1
Files count: eee
Total size: zzz TB

Validation failed.

The following VMs are corrupted:
1. 'xxxxxxx': File "yyyyyyyyy" is corrupted. Failed to decomp
ress LZ4 block: Bad crc (original crc: b0f45e41, current crc: bdced7a7).
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Re: restore large files from tape

Veeam Logoby foggy » Thu Mar 13, 2014 10:40 am

QC and support departments are currently looking into this to find the reasons of this inconsistency.
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Re: restore large files from tape

Veeam Logoby Phorward » Wed Apr 02, 2014 11:32 am

Any news on this?

I'm having the same problem. I have a support case opened, 00513625. I was told by support to split the backup into smaller jobs that fit on one tape and that worked except for one VM that is too large to fit on one tape. We are running 7.0.0.839. The library is a HP MSL 2024 G3 with a LTO drive, both with the latest firmware.
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Re: restore large files from tape

Veeam Logoby foggy » Wed Apr 02, 2014 11:39 am

As far as I can see from the case provided above, it is still under investigation. Please continue working with support as having more information would allow our engineers to nail the issue down faster.
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Re: restore large files from tape

Veeam Logoby mazur1000 » Thu May 08, 2014 12:58 pm

my problem has been resolved by veeam support
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Re: restore large files from tape

Veeam Logoby v.Eremin » Thu May 08, 2014 1:04 pm

If you can share the found resolution for the convenience, it will be much appreciated. Thanks.
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Re: restore large files from tape

Veeam Logoby mazur1000 » Sun May 11, 2014 8:52 pm

the solution is to replace the three files. I do not know how to add them in the forum
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Re: restore large files from tape

Veeam Logoby v.Eremin » Mon May 12, 2014 8:37 am

Got it. The solution wasn't to perform specific steps, but rather to replace certain product files. For all new-comers, if you experience the same problem, please, contact our support team. They will provide you with the new files, once your issue is confirmed to be the known one.

Thanks.
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